TerraSAR的首都机场形变特征分析  

Analysis of land subsidence features based on TerraSAR images in Beijing-capital international airport

作　　者：何亚乐[1,2,3] 朱琳[1,2,3] 宫辉力[1,2,3] 王荣[4] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]北京市城市环境过程与数字模拟国家重点实验室培育基地,北京100048 [3]水资源安全北京实验室,北京100048 [4]北京市水文地质工程地质大队,北京100195

出　　处：《测绘科学》2016年第12期14-18,228,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41201420;41130744)

摘　　要：针对首都机场的地表形变问题,该文采用永久散射体干涉测量技术,对2010—2013年间33景高分辨率TerraSAR(升轨)数据进行处理,获取首都机场地表形变的时空变化特征;分析了地下水水位与地面形变的关系,以及地表动静载荷对地面形变的影响。结果表明:PSInSAR获取的测量结果精度较高,与水准测量结果相比误差仅为1.08mm;首都机场及其附近区域存在不同程度的地表形变,机场西北部区域沉降速率明显大于东南部;T1航站楼沉降速度较快达到45mm/a,T2航站楼存在不均匀沉降现象,北端沉降速率明显大于南端;地表形变与地下水位变化过程存在一致性,并有季节性信息,每年冬春两季沉降量大于夏秋两季;地面动静载荷的不均匀分布是地表出现不均匀沉降的原因之一,动静载荷较大的西侧跑道、T1、T2航站楼区域沉降速率明显大于其他区域。Aiming at the land subsidence in Beijing-capital international airport,this paper took 33 Xband TerraSAR（ascending）images from 2010 to 2013to obtain the spatial-temporal evolution of land deformation.The groundwater level data was combined to analyze the possible relation with groundwater level changes and the effect of different dynamic and static load on land subsidence.The results showed as follows：land subsidence monitored by SAR images have a high accuracy and the errors of the outputs by TerraSAR compared with leveling data is 1.08mm;land subsidence was unevenly distributed and continuously increased from 2010 to 2013;the subsidence of north west area was heavily than south east area;the maximum land subsidence rate of terminal 1was 45 mm/a;terminal 2occurred uneven subsidence,deformation rate in north was higher than south;the fluctuation of land subsidence is consistent with the change of groundwater level;the subsidence velocities in winter and spring are larger than that in summer and autumn;the dynamic and static load uneven distribute is the one reason of uneven subsidence in this district;terminal 1,terminal 2and the west airfield runway have a higher land subsidence rate than other areas.

关 键 词：地面沉降 PSINSAR 地下水水位 季节性形变 地表动静载荷 

分 类 号：P225[天文地球—大地测量学与测量工程]